//
//  WelComeViewController.swift
//  SinaWeibo
//
//  Created by liyue on 15/11/12.
//  Copyright © 2015年 李越. All rights reserved.
//

import UIKit
import SnapKit
import SDWebImage

class WelComeViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        setupUI()
//        startAnimation()
    }
    
    override func viewDidAppear(animated: Bool) {
        
        super.viewDidAppear(animated)
        startAnimation()
    }

    override func loadView() {
        
        view = backImage
    }
    
    private func startAnimation() {
        
        //外部改变约束
        self.iconImage.snp_updateConstraints(closure: { (make) -> Void in
            make.centerX.equalTo(view.snp_centerX)
            make.bottom.equalTo(self.view.snp_bottom).offset(-self.view.bounds.height + 180)
        })
        
        UIView.animateWithDuration(1.2, delay: 0, usingSpringWithDamping: 0.9, initialSpringVelocity: 9.8, options: [], animations: { () -> Void in
            //闭包内部 强制刷新页面
            self.view.layoutIfNeeded()
            }) { (_) -> Void in
                
                UIView.animateWithDuration(0.6, animations: { () -> Void in
                    
                    self.welcomeLabel.alpha = 1
                    }, completion: { (_) -> Void in
                        
                        //发出通知
                        NSNotificationCenter.defaultCenter().postNotificationName(AppSwitchRootViewControler, object: nil)
                })
        }
    }
    
    //添加子视图
    private func setupUI() {
        
        view.addSubview(iconImage)
        view.addSubview(welcomeLabel)
        
        //设置布局
        iconImage.snp_makeConstraints { (make) -> Void in
            
            make.centerX.equalTo(view.snp_centerX)
            make.bottom.equalTo(view.snp_bottom).offset(-180)
            make.width.equalTo(90)
            make.height.equalTo(90)
        }
        
        welcomeLabel.snp_makeConstraints { (make) -> Void in
            
            make.centerX.equalTo(view.snp_centerX)
            make.top.equalTo(iconImage.snp_bottom).offset(20)
        }
        //加载图片
        iconImage.sd_setImageWithURL(UserAccountViewModel().headURL, placeholderImage: UIImage(named: "avatar_default_big"))
        
        //圆角图片
        iconImage.layer.cornerRadius = 45
        iconImage.layer.masksToBounds = true
    }
    
    //背景视图
    private lazy var backImage: UIImageView = UIImageView(image: UIImage(named: "ad_background"))
    //头像
    private lazy var iconImage: UIImageView = UIImageView()
    
    private lazy var welcomeLabel: UILabel = {
        
        let l = UILabel()
        l.textColor = UIColor.lightGrayColor()
        l.font = UIFont.systemFontOfSize(19)
        l.textAlignment = NSTextAlignment.Center
        l.text = (UserAccountViewModel().userName ?? "") + " 欢迎归来"
        l.alpha = 0
        l.sizeToFit()
        
        return l
    }()
}
